Wasted ramie fiber treated and non-treated with alkalization can also produce promising result with average absorption coefficient of 0.6 at frequency range of 315 Hz - 3.2 kHz [7].
Wasted ramie fiber treated and non-treated with alkalization can also produce promising result with average absorptioncoefficient of 0.6 at frequency range of 315 Hz - 3.2 kHz [7].